Bug#976608: Issues with wireless card driver rtw88_8821ce on linux-image-5.9.0-0.bpo.2-amd64
Package: linux-image-5.9.0-0.bpo.2-amd64
Version: 5.9.6-1~bpo10+1
Wireless card was not behaving normally after upgrading to kernel
5.9 from the backports (slow speeds, possibly repeatitive scannings).
I had to blacklist the two following modules (second module possibly optional).
dpkg -S /lib/modules/5.9.0-0.bpo.2-amd64/kernel/drivers/net/wireless/realtek/rtw88/rtw88_8821ce.ko
linux-image-5.9.0-0.bpo.2-amd64: /lib/modules/5.9.0-0.bpo.2-amd64/kernel/drivers/net/wireless/realtek/rtw88/rtw88_8821ce.ko
dpkg -S /lib/modules/5.9.0-0.bpo.2-amd64/kernel/drivers/platform/x86/ideapad-laptop.ko
linux-image-5.9.0-0.bpo.2-amd64: /lib/modules/5.9.0-0.bpo.2-amd64/kernel/drivers/platform/x86/ideapad-laptop.ko
Then I installed this driver:
After installing the above driver manually, the wireless card behaves normally.
More info:
dpkg -S linux-image-5.9.0-0.bpo.2-amd64
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/bug/linux-image-5.9.0-0.bpo.2-amd64/include-1tainted
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/bug/linux-image-5.9.0-0.bpo.2-amd64/include-model
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/bug/linux-image-5.9.0-0.bpo.2-amd64/control
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/bug/linux-image-5.9.0-0.bpo.2-amd64
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/doc/linux-image-5.9.0-0.bpo.2-amd64
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/bug/linux-image-5.9.0-0.bpo.2-amd64/info
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/doc/linux-image-5.9.0-0.bpo.2-amd64/changelog.gz
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/bug/linux-image-5.9.0-0.bpo.2-amd64/include-usb
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/bug/linux-image-5.9.0-0.bpo.2-amd64/presubj
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/bug/linux-image-5.9.0-0.bpo.2-amd64/include-modules
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/bug/linux-image-5.9.0-0.bpo.2-amd64/include-network
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/bug/linux-image-5.9.0-0.bpo.2-amd64/include-1cmdline
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/bug/linux-image-5.9.0-0.bpo.2-amd64/include-pci
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/bug/linux-image-5.9.0-0.bpo.2-amd64/include-0version
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/bug/linux-image-5.9.0-0.bpo.2-amd64/include-dmesg
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/bug/linux-image-5.9.0-0.bpo.2-amd64/include-pstore
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/bug/linux-image-5.9.0-0.bpo.2-amd64/script
linux-image-5.9.0-0.bpo.2-amd64: /usr/share/doc/linux-image-5.9.0-0.bpo.2-amd64/copyright
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-===============================-===============-============-=================================
ii linux-image-5.9.0-0.bpo.2-amd64 5.9.6-1~bpo10+1 amd64 Linux 5.9 for 64-bit PCs (signed)
dpkg --status linux-image-5.9.0-0.bpo.2-amd64
Package: linux-image-5.9.0-0.bpo.2-amd64
Status: install ok installed
Priority: optional
Section: kernel
Installed-Size: 277139
Architecture: amd64
Source: linux-signed-amd64 (5.9.6+1~bpo10+1)
Version: 5.9.6-1~bpo10+1
Replaces: linux-image-5.9.0-0.bpo.2-amd64-unsigned
Depends: kmod, linux-base (>= 4.3~), initramfs-tools (>= 0.120+deb8u2) | linux-initramfs-tool
Recommends: firmware-linux-free, apparmor
Suggests: linux-doc-5.9, debian-kernel-handbook, grub-pc | grub-efi-amd64 | extlinux
Breaks:
initramfs-tools (<< 0.120+deb8u2), wireless-regdb (<<
2019.06.03-1~), xserver-xorg-input-vmmouse (<< 1:13.0.99)
Conflicts: linux-image-5.9.0-0.bpo.2-amd64-unsigned
Description: Linux 5.9 for 64-bit PCs (signed)
The Linux kernel 5.9 and modules for use on PCs with AMD64, Intel 64 or
VIA Nano processors.
.
The kernel image and modules are signed for use with Secure Boot.
Built-Using: linux (= 5.9.6-1~bpo10+1)
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